Squidpy

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed
Added
* Added Artifact action to CI/CD so we can download test images from runners by timtreis in https://github.com/scverse/squidpy/pull/973
* Add function for calculating niches by LLehner in https://github.com/scverse/squidpy/pull/831


**Full Changelog**: https://github.com/scverse/squidpy/compare/v1.6.4...v1.6.5

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed
Added
* Added NumFOCUS trademark and statement to README by melonora in https://github.com/scverse/squidpy/pull/965
Removed
* Removed leiden as hard dep to stay BSD3 compliant by Intron7 in https://github.com/scverse/squidpy/pull/972
Fixed
* Fixed bug in CICD by timtreis in https://github.com/scverse/squidpy/pull/971

New Contributors
* Intron7 made their first contribution in https://github.com/scverse/squidpy/pull/972

**Full Changelog**: https://github.com/scverse/squidpy/compare/v1.6.3...v1.6.4

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed
Added
* Added function to download Visium as SpatialData by timtreis in https://github.com/scverse/squidpy/pull/949
Changed
* Upper bound `zarr` to <3 by ilan-gold in https://github.com/scverse/squidpy/pull/935
* Pin `xarray` to >=2024.10.0 by timtreis in https://github.com/scverse/squidpy/pull/954
* Mirror `SpatialData` release action by timtreis in https://github.com/scverse/squidpy/pull/960
Fixed
* Fixes to var_by_distance functionalities by LLehner in https://github.com/scverse/squidpy/pull/929
* Rename `count_file` in internal API to `counts_file`; Improves error message when wrongly specified by flying-sheep in https://github.com/scverse/squidpy/pull/944
* Updated linkcheck times for sphinx to prevent timeouts by timtreis in https://github.com/scverse/squidpy/pull/955
* Fixed error in tox.ini by timtreis in https://github.com/scverse/squidpy/pull/956


**Full Changelog**: https://github.com/scverse/squidpy/compare/v1.6.2...v1.6.3